河南新乡外来植物分布动态调查及其危害性评估

摘要

Fifty-eight invasive alien species were found in Xinxiang of Henan Province in 2005.Four invasive alien weed species, including three of Compositae and one of Solanaceae, were newly found here during 2006-2010.Among them,Conyza sumatrensis was the most hazardous, and the population of Flaveria bidentis was expanding, while field population of Ageratum conyzoides was not established, and the hazard of Nicandra physaloides was not obvious.%为明确河南新乡外来入侵植物的动态变化及其危害性,近年来跟踪调查了新乡外来入侵植物的种类和分布情况,筛选出近5年来(2006-2010年)在新乡新发现的外来植物,并结合相关研究结果,评估其在新乡的入侵风险.结果表明,2005年,河南新乡有58种外来入侵植物,2006-2010年间,调查发现4种新入侵的外来植物,其中菊科植物3种,茄科植物1种.这4种外来入侵植物中,苏门白酒草的入侵风险最高,黄顶菊正处于扩张期,胜红蓟未发现野外定殖群落,假酸浆危害潜力较小.